honestly succulents are kind of supreme, they're basically 0 maintenance of any kind.
Don't need to be watered so long as it rains 5 times per year, even if you don't pick a kind that stays low to the ground it'll just be shaved by the trams so who cares, and they're still quite pretty IMO especially when they decide to flower!
They're so good that a lot of railways with any sort of dirt between the tracks will just automatically gain succulents after a couple decades.

(Deansgate - Castlefield station, Manchester)